and mitt romney will go head-to-head during the first presidential debate. last night in denver romney previewed one of his lines of attack. >> we've had 43 straight months of unemployment above 8% what does the president have to say? he says forward. i think for warned is a better term. -- forewarned is a better term. >> reporter: romney is trailing the president in the polls, the candidate has spent many hours practicing he will huddle with advisers again. >> he's playing barack obama in these mock debates, i don't like him very much any more. >> reporter: president obama took a break from practice yesterday to visit a campaign office and make a few calls to unsuspecting voters. >> the president: andrea, this is barack obama, how are you? that's right. >> reporter: with it was a brief break for the president who like romney has been rehearsing for days. senator kerry is playing romney in mr. obama's practice sessions. managing expectations saying last night the president is out of practice. last time he debated was four years ago. according to the latest p